西门子中国一级代理商PLC代理
由于PLC具有上述特点，使得PLC的应用范围*为广泛，可以说只要有工厂、有控制要求就会有PLC的应用。
1.1.3 PLC的分类
PLC是应现代化生产的需要而产生的，PLC的分类也必然要符合现代化生产的需求。一般来说，可以从3个角度对PLC进行分类，即控制规模、控制性能、结构特点。
1．按PLC的控制规模分类 
PLC按控制规模可以分为小型PLC、中型PLC和大型PL
| roduct No. / Product Description | Listprice / Your price | ||
| | 6GK5206-2BB00-2AC2SCALANCEXC206-2 manageable Layer 2 IE switch; IEC 62443-4-2 certified; 6x100 Mbit/s RJ45 ports; 2x 100 Mbit/s ST/BFOC ports; 1x consoleport; diagnostics LED; redundant power supply; temperature range-40 °C to +70 °C; assembly: DIN rail/S7 mounting rail/wallredundancy functions; office features (RSTP, VLAN,...); PROFINET IOdevice; Ethernet/IP-compliant C-PLUG slot; | Show prices | |
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| | 6GK5206-2BD00-2AC2SCALANCEXC206-2 manageable Layer 2 IE switch; IEC 62443-4-2 certified; 6x10/100 Mbit/s RJ45 ports; 2x 100 Mbit/s SC-ports, 1x console port;diagnostics LED; redundant power supply; temperature range -40 °Cto +70 °C; assembly: DIN rail/S7 mounting rail/wall; redundancyfunctions; office features (RSTP, VLAN,...); PROFINET IO deviceEthernet/IP-compliant C-PLUG slot. | Show prices | |
| | 6GK5206-2BS00-2AC2SCALANCEXC206-2SFP manageable Layer 2 IE switch; IEC 62443-4-2 certified;6x 10/100 MBit/s RJ45 ports; 2x 100/1000 Mbit/s SFP; 1x consoleport; diagnostics LED; redundant power supply; temperature range-40 °C to +70 °C; assembly: DIN rail/S7 mounting rail/wall Officeredundancy functions features (RSTP, VLAN,...); PROFINET IO device;Ethernet/IP-compliant; C-plug slot; | Show prices | |
| | 6GK5206-2GS00-2AC2SCALANCEXC206-2SFP G manageable Layer 2 IE switch; IEC 62443-4-2 certified;6x 10/100/1000 Mbit/s RJ45 ports; 2x 1000 Mbit/s SFP; 1x consoleport; diagnostics LED; redundant power supply; temperature range-40 °C to +70 °C; assembly: DIN rail/S7 mounting rail/wall;redundancy functions; office features (RSTP, VLAN,...); PROFINET IOdevice; Ethernet/IP-compliant; C-PLUG slot; | Show prices | |
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| | 6GK5208-0BA00-2AC2SCALANCEXC208 manageable Layer 2 IE switch; IEC 62443-4-2 certified; 8x10/100 Mbit/s RJ45 ports; 1x console port; diagnostics LED;redundant power supply; temperature range -40 °C to +70 °C;assembly: DIN rail/S7 mounting rail/wall Office redundancyfunctions features (RSTP, VLAN,...); PROFINET IO deviceEthernet/IP-compliant C-plug slot; | Show prices | |
| | 6GK5216-0BA00-2AC2SCALANCEXC216 manageable Layer 2 IE switch; IEC 62443-4-2 certified; 16X10/100 Mbit/s RJ45 ports; 1x console port, diagnostics LED;redundant power supply; temperature range -40 °C to +70 °C;assembly: DIN rail/S7 mounting rail/wall Office redundancyfunctions features (RSTP, VLAN,...); PROFINET IO device;Ethernet/IP-compliant; C-plug slot; | Show prices | |
| | 6GK5216-4BS00-2AC2SCALANCEXC216-4C manageable Layer 2 IE switch; IEC 62443-4-2 certified; 12x10/100 Mbit/s RJ45 ports; 4x 1000 Mbit/s combo ports (either 1000Mbit/s/ SFPs or 10/100/1000 Mbit/s RJ45 ports can be used); 1xconsole port; diagnostics LED; redundant power supply; temperaturerange -40 °C to +70 °C; assembly: DIN rail/S7 mounting rail/wall;redundancy functions; office features (RSTP, VLAN,...); PROFINET IOdevice; Ethernet/IP-compliant; C-PLUG slot; | Show prices | |
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| | 6GK5216-4GS00-2AC2SCALANCEXC216-4C G manageable Layer 2 IE switch; IEC 62443-4-2 certified;Full gigabit; 12x 10/100/1000 Mbit/s RJ45 ports; 4x 1000 Mbit/scombo ports (either 1000 Mbit/s/ SFPs or 10/100/1000 Mbit/s RJ45ports can be used); 1x console port; diagnostics LED; redundantpower supply; temperature range -40 °C to +70 °C; assembly: DINrail/S7 mounting rail/wall; redundancy functions; office features(RSTP, VLAN,...); PROFINET IO device; Ethernet/IP-compliant; C-PLUGslot; | Show prices | |
| | 6GK5224-0BA00-2AC2SCALANCEXC224 manageable Layer 2 IE switch; IEC 62443-4-2 certified; 24x10/100 Mbit/s RJ45 ports; 1x console port, diagnostics LED;redundant power supply; temperature range -40 °C to +70 °C;assembly: DIN rail/S7 mounting rail/wall Office redundancyfunctions features (RSTP, VLAN,...); PROFINET IO deviceEthernet/IP-compliant, C-plug slot; | Show prices | |
| 西门子中国一级代理商PLC代理 | |||
| | 6GK5224-4GS00-2AC2SCALANCEXC224-4C G manageable Layer 2 IE switch; IEC 62443-4-2 certified;Full gigabit; 20x 10/100/1000 Mbit/s RJ45 ports; 4x 1000 Mbit/scombo ports (either 1000 Mbit/s/ SFPs or 10/100/1000 Mbit/s RJ45ports can be used); 1x console port; diagnostics LED; redundantpower supply; temperature range -40 °C to +70 °C; assembly: DINrail/S7 mounting rail/wall; redundancy functions; office features(RSTP, VLAN,...); PROFINET IO device; Ethernet/IP-compliant; C-PLUGslot;西门子中国一级代理商PLC代理 | ||
学习PLC编程与它们有必然的关系，因为这些都是作为PLC的接口设备接到PLC端口上去的，它们的状态与PLC程序是息息相关的。从程序要求来看，没有必要去专门先学习这方面的课程，而是应该是用到就学、边学边用。待到一定程度后，再系统地学习一下，效果会*好。辑代数是从数学的角度来研究客观事物“真”与“假”之间的逻辑推理关系。在继电控制和PLC多学员都有这样的感觉，当从事某一项新的工作时，总感到自己缺乏系统的理论知识和丰富的实践知识。那么怎么办？一个字：学。理论知识可以系统地学，学习之前，应向周围的同行、同事去问一下，应学习哪些知识，有哪些书可以阅读，有没有系统的培训等。这样可以少走弯路，*学要还是靠自己。PLC的输入／输出系统功能完善，性能可靠，能够适应各种形式和性质的开关量和模拟量的输入／输出。PLC的功能单元能方便地实现D/A、A/D转换以及PID运算，实现过程控制、数字控制等功能。它还可以和其他计算机系统、控制设备共同组成分布式或分散式控制系统，能够很好地满足各种控制的需要。
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PLC体积小、重量轻，便于安装。PLC具有完善的自诊断及监视等功能，对于其内部的工作状态、通信状态、 I/O点状态、异常状态和电源状态都有显示。工作人员通过它可以查出故障原因，便于迅速处理。
C。
1）小型PLC西门子中国一级代理商PLC代理
小型PLC一般指输入／输出点数（I/O点数）小于256点、采用单CPU（8位或16位）、用户程序存储器的容量在4KB以下的PLC，以开关量控制为主。由于受控制点数所限，其控制功能有一定的局限性。小型PLC小巧、灵活，可以直接安装在电气控制柜内，很适合单机控制或小型系统的控制。德国西门子（SIEMENS）公司（以下简称西门子公司）的S7-200和S7-1200系列、日本三菱公司的FX系列等均属于小型PLC。
西门子中国一级代理商PLC代理